[Enter-at-777]

I'm not sure how coherent this will be, so consider this an apology in advance.

The human mind has a peculiar way of determining what is tolerated and what is despised. Quite often, something that is similar-but-not-the-same (be it a nationality, an interest, or what have you) will trigger much stronger vitriol than something completely alien. Think how the local football team's most intense rival isn't the school from the other side of the state or the city across the country, but the one from the next town over.

Hence the disdain that furries have for bronies, the rivalry between Trek Wars, the way "PC master race" gamers and Apple enthusiasts are incapable of not insulting people who don't use the same product as them. It's just human psychology.

I very much know what you mean, but in my perspective, once you dwell into the world of "kinks" and fetishes that aren't considered normal (like feet for example is normal, while inflation isn't) then at this point you can't really "look down upon" anymore. Find the fetish to be weird, why yes of course that's acceptable. Look down upon... now you're getting silly. But that may just be me.